Now showing items 1322-1341 of 1453

• A strategy for a general search for new phenomena using data-derived signal regions and its application within the ATLAS experiment ﻿

(Peer reviewed; Journal article, 2019-02-06)
This paper describes a strategy for a general search used by the ATLAS Collaboration to find potential indications of new physics. Events are classified according to their final state into many event classes. For each event ...
• Studier av algoritmer for tau-identifikasjon ﻿

(Master thesis, 2010-05-31)
Mange signaturer for ny fysikk i ATLAS vil henfalle til eit eller fleire tau-lepton. Derfor har ATLAS utvikla verktøy for identifikasjon av tau-lepton som henfall eit eller fleire pion. Verktøya er kompliserte og inneheld ...
• Studies of $Z\gamma$ production in association with a high-mass dijet system in $pp$ collisions at $\sqrt{s}=$ 8 TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2017-07)
The production of a $Z$ boson and a photon in association with a high-mass dijet system is studied using 20.2fb$^{-1}$ of proton-proton collision data at a centre-of-mass energy of $\sqrt{s}$ = 8 TeV recorded with ...
• Studies of J/ψ production at forward rapidity in Pb–Pb collisions at √sNN = 5.02 TeV ﻿

(Journal article; Peer reviewed, 2020-02-06)
The inclusive J/ψ production in Pb–Pb collisions at the center-of-mass energy per nucleon pair √sNN = 5.02 TeV, measured with the ALICE detector at the CERN LHC, is reported. The J/ψ meson is reconstructed via the dimuon ...
• Studies of the performance of the ATLAS detector using cosmic-ray muons ﻿

(Peer reviewed; Journal article, 2011-03-29)
Muons from cosmic-ray interactions in the atmosphere provide a high-statistics source of particles that can be used to study the performance and calibration of the ATLAS detector. Cosmic-ray muons can penetrate to the ...
• Studies of the Relative Biological Effectiveness and Biological Dose in Proton and Carbon Ion Therapy ﻿

(Doctoral thesis, 2020-04-28)
Protons and heavier ions have an increased relative biological effectiveness (RBE) compared to photons. While variable RBE models are applied clinically in carbon ion therapy, the RBE in proton therapy is accounted for ...
• Studies on the solid-state transformation and chemical modification reactions of carbon black nanoparticles ﻿

(Doctoral thesis, 2015-06-26)
Carbon black (CB) is nanoscale particles with quasi-spherical nature, produced from incomplete combustion of hydrocarbons. It is a well-known type of amorphous carbon which exists in the form of aggregated spheres. CBs are ...
• A study of capillary pressure and capillary continuity in fractured rocks ﻿

(Doctoral thesis, 2008-09-05)
The production of oil is challenging in fractured reservoirs due to the large transmissibility contrast between matrix and fracture, and primary recovery is often low. The recovery efficiency depends on the relationship ...
• Study of Gas Mobility Control during CO2 Injection for Enhanced Oil Recovery ﻿

(Master thesis, 2016-06-01)
Carbon Dioxide (CO2) has been used as a commercial source for Enhanced Oil Recovery (EOR) for over 40 years. In recent years, the utilization of anthropogenic CO2 has become more attractive, because of its proven EOR and ...
• Study of heavy-flavor quarks produced in association with top-quark pairs at √s =7 TeV using the ATLAS detector ﻿

(Peer reviewed; Journal article, 2014-04-21)
Using a sample of dilepton top-quark pair (tt¯) candidate events, a study is performed of the production of top-quark pairs together with heavy-flavor (HF) quarks, the sum of tt¯+b+X and tt¯+c+X, collectively referred to ...
• Study of Industrial Grade Thermal Insulation at Elevated Temperatures ﻿

(Journal article; Peer reviewed, 2020)
Thermal insulation is used for preventing heat losses or heat gains in various applications. In industries that process combustible products, inorganic-materials-based thermal insulation may, if proven sufficiently heat ...
• Study of J/ψ azimuthal anisotropy at forward rapidity in Pb-Pb collisions at √sNN=5.02 TeV ﻿

(Peer reviewed; Journal article, 2019-02-04)
The second (v2) and third (v3) flow harmonic coefficients of J/ψ mesons are measured at forward rapidity (2.5 < y < 4.0) in Pb-Pb collisions at √ sNN = 5.02 TeV with the ALICE detector at the LHC. Results are obtained with ...
• Study of leading hadrons in gluon and quark fragmentation ﻿

(Peer reviewed; Journal article, 2006-12)
The study of quark jets in e+e− reactions at LEP has demonstrated that the hadronisation process is reproduced well by the Lund string model. However, our understanding of gluon fragmentation is less complete. In this study ...
• A study of mass reconstruction in Z°→τ+τ- ﻿

(Master thesis, 2010-05-28)
Neutrinos escaping detection is one of the main problems in mass reconstruction with tau leptons. They must be neglected or corrected for in some way. This thesis discusses two methods of handling the neutrinos in different ...
• Study of meso-scale reversed flow events in the polar ionosphere by SuperDARN radars ﻿

(Master thesis, 2017-06-29)
In this study we have investigated Reversed Flow Events (RFEs) in the northern hemisphere polar cap. A RFE is an ∼50-250 km wide flow channel that opposes the large scale background flow. A total of 57 new RFEs were ...
• A study of selected problems related to accidental process fires ﻿

(Doctoral thesis, 2011-04-15)
An experimental full scale characterization of a turbulent propane jet flame has been made in terms of temperatures and radiation. Sonic propane gas releases were achieved at steady pressure and near steady flow. Commercial ...
• A study of temperature profiles in ceiling jets under horizontal unconfined ceilings with the CFD tools FLACS and FDS ﻿

(Master thesis, 2017-06-22)
The key to controlling accidental fires, is early detection by the correct placement of devices such as smoke detectors and sprinkler systems. Smoke is accompanied by a temperature rise, brought about by the ceiling jet ...
• A study of the b-quark fragmentation function with the DELPHI detector at LEP I and an averaged distribution obtained at the Z Pole ﻿

(Peer reviewed; Journal article, 2011-02-23)
The nature of b-quark jet hadronisation has been investigated using data taken at the Z peak by the DELPHI detector at LEP. Two complementarymethods are used to reconstruct the energy of weakly decaying b-hadrons, Eweak B ...
• A study of the Coriolis flowmeter as a reference instrument in multiphase flow ﻿

(Master thesis, 2015-09-11)
The objective of this thesis was to investigate how a two-liquid mixture, and injected gas, affects the measurements of a Coriolis flowmeter. Furthermore it was of interest to investigate whether entrained gas could be ...
• Study of the dependence of direct soft photon production on the jet characteristics in hadronic Z0 decays ﻿

(Peer reviewed; Journal article, 2010-06-09)
An analysis of the direct soft photon production rate as a function of the parent jet characteristics is presented, based on hadronic events collected by the DELPHI experiment at LEP1. The dependences of the photon rates ...